Mobile Tyre Fitting in St Mawes

What we can do in St Mawes

• Mobile tyre fitting — supply and fit a replacement at your home, workplace or the roadside, including balancing and disposal of the old casing.
• Mobile puncture repair — where the damage is inside the repairable area of the tread, a repair is cheaper and quicker than replacement.
• Commercial tyre fitting — vans, minibuses and other light commercial vehicles.

Stuck in St Mawes right now? Call 07989 606060 and we will tell you what we can do and what it will cost before we set off.

Before we arrive

• Find your locking wheel nut key. Without it the wheel cannot come off. It is usually in the glovebox, the boot well, or with the spare.
• Read your tyre size off the sidewall, for example 205/55 R16 91V, so we arrive with the right tyre rather than making a second trip.
• If you are on a motorway or dual carriageway, get as far left as you can or into a refuge, then everyone out through the passenger doors, over the barrier and well back from the carriageway — not in the car. Ring with the junction number and your direction of travel.
• Describe where you are, not just your postcode. A junction number, a bay number, a farm, a pub or a bridge puts us on the spot far faster — rural postcodes can cover a mile of near-identical lane. We bring our own lighting, so darkness is not a problem.

More detail in our guides on what to do with a flat tyre on the motorway and checking your tread depth.

Repair or replace

Whether a tyre can be repaired is decided by where the damage is, not by how big the hole looks. Damage inside the central three-quarters of the tread, up to 6mm across, is repairable under BS AU 159. Damage in the shoulder or the sidewall is not, at any size — there is no way to reinforce a sidewall that flexes on every revolution.

The other thing that rules out a repair is having driven on the tyre flat. A short distance is enough: the sidewall folds under the rim and the internal cords break. That often does not deflate the tyre at the time — it shows up days later as a soft rounded bulge, and a tyre in that condition has to be replaced whatever the original puncture looked like.

How the damage was made matters as much as where it is. A nail or a screw pierces, leaving a neat hole that is usually well within the limit. Flint, crushed stone, quarry aggregate and dropped stainless fixings cut instead — a gouge or a tear rather than a puncture — and a cut frequently exceeds the repairable size even when it lands squarely in the middle of the tread. That is why we take the tyre off and look inside before telling you either way, rather than judging it from the outside.

Impact damage behaves the same way. A pothole or a kerb taken at speed compresses the suspension fully and pinches the sidewall between the rim and the obstacle. If that has happened, check both tyres on that side — the rear takes the same hit a fraction of a second after the front — and look for a bulge rather than for a hole.

We carry both outcomes to every job, so a repair that turns out not to be safe does not become a second visit.

Age and wear

Tread depth is not the only thing that retires a tyre. Rubber hardens as it ages whatever the mileage, which is why a caravan, motorhome, trailer or second car can carry almost full tread on a casing that is well past useful life. The four-digit date code on the sidewall gives the week and year it was made — our guide on how long tyres last covers where the line falls.

Depth matters most in standing water. The legal minimum is 1.6mm across the central three-quarters, but a tyre's ability to clear water falls off well above that — by about 3mm you are losing it noticeably, and aquaplaning starts at lower speeds than most drivers expect. Our tread depth guide covers checking it with a 20p coin in about a minute.

Wear patterns are worth reading too. Both outer shoulders going before the middle usually means underinflation, or a lot of cornering and hill descent; one edge alone is more often alignment. We will tell you which it looks like when we are there — see uneven tyre wear for the full picture.

Vans and light commercials

A van needs a tyre carrying the C marking and the correct load index. That is not interchangeable with a passenger tyre of the same nominal size, whatever may have been fitted before — the casing is built to carry more, and a loaded van on passenger-rated tyres is running outside the rating.

Tell us whether the van is loaded when you ring, and we will bring the right fitment first time. Details of what we carry are on the commercial tyres page.

How the repair is done

The wheel comes off, the tyre comes off the rim, and the inside of the casing is inspected before anything else happens. The puncture is then repaired from within using a combined plug and patch, and the wheel is balanced before it goes back on.

That inspection is the part that matters. An external plug pushed into the tread without removing the tyre is a get-you-home measure: it can seal the hole while leaving damage inside the casing entirely undetected, and that damage is what causes tyres to fail later at speed. It is the same job a garage does, done where the vehicle already is.

A slow leak with no puncture to find

A tyre that loses air over days with nothing in the tread has usually failed at the seal rather than the surface — a corroded alloy bead seat, or a perished valve stem. Neither can be found with the tyre still on the rim, and neither is fixed by topping the pressure up.

It typically announces itself on the first cold morning of the year. Cold air contracts, dropping the pressure a few PSI, and a leak that was tolerable through mild weather is a visibly flat tyre by the time you come out to the car. The fix is the tyre off the rim, the sealing face cleaned back to sound metal, and a new valve.

Working conditions around St Mawes

Salt. Sea air corrodes far harder than road salt does, and it works on the parts of a wheel you cannot see. Pitted alloy bead seats and corroded valve stems are the standard coastal fault, and they present as a slow leak with no puncture anywhere in the tread. Vehicles parked near the front year round get it worst.

Gradients. A sustained climb builds heat in the casing, and heat finds whatever weakness is already there — which is why underinflated or previously damaged tyres are the ones that let go on a long pull rather than on the flat. On a steep slope we will ask to move onto level ground before jacking: a handbrake holds two wheels, and that margin drops sharply the moment one of them comes off the ground.

Common questions in St Mawes

Could you not just come over on the ferry?

No. The St Mawes ferry is a passenger boat and takes no vehicles, so a fitting van has to drive round whatever the tide is doing. We plan on that basis rather than pretending otherwise.

How long does it take you to get here?

Longer than the map distance from Falmouth suggests, because the map distance is over water. We will give you a realistic time based on which route is quicker at that hour.

My car is on a slope on one of the streets above the harbour.

Say which street. Some of them we can work on and some of them we would rather move off, and it is a two-minute conversation on the phone instead of a wasted visit.

Do you cover Portscatho, Gerrans and St Just in Roseland?

Yes, the whole peninsula down to St Anthony Head, and the A3078 back up to Tregony.

Is the salt really worse here than inland?

On a car that lives on the front, yes, and it shows up on the wheels long before it shows anywhere you can see it from the driving seat.

Not in St Mawes?

We cover the rest of Cornwall and beyond. If you are closer to one of these, the same service and the same number applies:

• Mobile tyre fitting in Bodmin
• Mobile tyre fitting in Bude
• Mobile tyre fitting in Bugle
• Mobile tyre fitting in Callington
• Mobile tyre fitting in Camborne
• Mobile tyre fitting in Camelford
• Mobile tyre fitting in Chacewater
• Mobile tyre fitting in Delabole
• Mobile tyre fitting in Devoran
• Mobile tyre fitting in Falmouth
• Mobile tyre fitting in Fowey
• Mobile tyre fitting in Grampound

See every area we cover.